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First-Row Transition Metal-Containing Ionic Liquids as Highly Active Catalysts for the Glycolysis of Poly(ethylene terephthalate) (PET)
Alternative TitleACS Sustain. Chem. Eng.
Wang, Qian1,2; Geng, Yanrong1; Lu, Xingmei1; Zhang, Suojiang1
2015-02-01
Source PublicationACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
Volume3Issue:2Pages:340-348
Abstract

First-row transition metal-containing ionic liquids (ILs) were synthesized and used to catalyze the degradation of poly(ethylene terephthalate) (PET) in ethylene glycol (EG). One important feature of these IL catalysts is that they have good thermal stability, and most of them, especially [bmim](2)[CoCl4] (bmim = 1-butyl-3-methyl-imidazolium) and [bmim](2)[ZnCl4], exhibit higher catalytic activity, compared with traditional catalysts, conventional IL catalysts, and some functional ILs. For example, utilizing [bmim](2)[CoCl4] as catalyst, the conversion of PET, selectivity of bis(hydroxyethyl) terephthalate (BHET), and mass fraction of BHET in products reach up to 100%, 81.1%, and 95.7%, respectively, under atmospheric pressure at 175 degrees C for only 1.5 h. Another important feature is that BHET can be easily separated from these IL catalysts and has high purity. Moreover, recycling results show that [bmim](2)[CoCl4] worked efficiently after being used six times. These all show that [bmim](2)[CoCl4] is an excellent IL catalyst for the glycolysis of PET. Finally, based on in situ IR spectra and experimental results, the possible mechanism of degradation with synthesized IL is proposed.

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First-row transition metal-containing ionic liquids (ILs) were synthesized and used to catalyze the degradation of poly(ethylene terephthalate) (PET) in ethylene glycol (EG). One important feature of these IL catalysts is that they have good thermal stability, and most of them, especially [bmim](2)[CoCl4] (bmim = 1-butyl-3-methyl-imidazolium) and [bmim](2)[ZnCl4], exhibit higher catalytic activity, compared with traditional catalysts, conventional IL catalysts, and some functional ILs. For example, utilizing [bmim](2)[CoCl4] as catalyst, the conversion of PET, selectivity of bis(hydroxyethyl) terephthalate (BHET), and mass fraction of BHET in products reach up to 100%, 81.1%, and 95.7%, respectively, under atmospheric pressure at 175 degrees C for only 1.5 h. Another important feature is that BHET can be easily separated from these IL catalysts and has high purity. Moreover, recycling results show that [bmim](2)[CoCl4] worked efficiently after being used six times. These all show that [bmim](2)[CoCl4] is an excellent IL catalyst for the glycolysis of PET. Finally, based on in situ IR spectra and experimental results, the possible mechanism of degradation with synthesized IL is proposed.

KeywordTransition Metal-containing Ionic Liquids Catalyze Glycolysis Poly(Ethylene Terephthalate) Mechanism
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/sc5007522
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSOFT-DRINK BOTTLES ; DEPOLYMERIZATION ; SOLVENTS ; FUTURE ; WASTE
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Engineering, Chemical
WOS IDWOS:000348894000018
Citation statistics
Cited Times:58[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11846
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
2.Shandong Normal Univ, Coll Chem Chem Engn & Mat Sci, Jinan 250014, Shandong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Qian,Geng, Yanrong,Lu, Xingmei,et al. First-Row Transition Metal-Containing Ionic Liquids as Highly Active Catalysts for the Glycolysis of Poly(ethylene terephthalate) (PET)[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2015,3(2):340-348.
APA Wang, Qian,Geng, Yanrong,Lu, Xingmei,&Zhang, Suojiang.(2015).First-Row Transition Metal-Containing Ionic Liquids as Highly Active Catalysts for the Glycolysis of Poly(ethylene terephthalate) (PET).ACS SUSTAINABLE CHEMISTRY & ENGINEERING,3(2),340-348.
MLA Wang, Qian,et al."First-Row Transition Metal-Containing Ionic Liquids as Highly Active Catalysts for the Glycolysis of Poly(ethylene terephthalate) (PET)".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 3.2(2015):340-348.
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